Hetero-binuclear near-infrared (NIR) luminescent Zn–Nd complexes self-assembled from the benzimidazole-based ligands

Zou, Dan; Feng, Weixu; Shi, Guey‐Yueh; Lü, Xingqiang; Zhang, Zhao; Zhang, Yao; Liu, Han; Fan, Daidi; Wong, Wai‐Kwok; Jones, Richard A.

doi:10.1016/j.saa.2012.08.048

Cited by 13 publications

(5 citation statements)

References 31 publications

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“…The single crystal X-ray analysis revealed that complexes 1-4 are isostructural and have the general formula 2[(l 4 -CO 3 ) in the crystal structure was identified via charge balance consideration. The presence of triethylamine seems to be crucial for this type of carbonato-bridged structure, because without the addition of alkaline medium the binuclear complexes characteristic for this type of Schiff base ligands are formed [4,61].…”

Section: Molecular and Crystal Structurementioning

confidence: 99%

“…The synthesis and characterization of heteronuclear complexes consisting simultaneously 3d and 4f metal centers are of great interest for their fascinating structures and functional applications as magnetic, electronic, catalytic and fluorescent materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. The mixed-donor multidentate ligands, such as Schiff bases, amine pyridyl carboxylates, amine phenolates offer the required number of donor atoms and can affect the coordination of 3d and 4f metal ions, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…In each complex the Ni II 2 Ln III 2 metal core has a similar topology. The hexadentate Schiff base ligands chelate the Ni(II) and Ln(III) ions forming two binuclear units, that are linked by two CO 3 2À ions giving a carbonato bridged (l 4 -CO 3 ) 2 {Ni II Ln III } 2 structures. Ferromagnetic interactions between 3d-4f metal centers have been observed for compounds 1 and 2.…”

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confidence: 99%

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Carbonato-bridged heteronuclear NiII2LnIII2 (Ln=Tb, Dy, Ho, Er, Tm, Yb, Lu) complexes synthesized by fixation of atmospheric CO2 – Structural and magnetic studies

et al. 2015

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Section: Molecular and Crystal Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Carbonato-bridged heteronuclear NiII2LnIII2 (Ln=Tb, Dy, Ho, Er, Tm, Yb, Lu) complexes synthesized by fixation of atmospheric CO2 – Structural and magnetic studies

et al. 2015

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“…Recently, design and syntheses of d-f heteronuclear coordination complexes have gained increasing attention due to their intriguing crystal structures [1][2][3] and potential applications in magnetism, catalysis, gas storage, luminescent materials, and so on. [4][5][6][7][8][9][10][11][12][13][14] Especially, lanthanide(III) complexes have line-like emission, high color purity, and long luminescence lifetimes, [15][16][17] and Nd III , Pr III , Er III , Ho III , and Yb III ions emitting in the NIR region have attracted more attention. [18][19][20][21] However, the fǞf* transitions of lanthanide(III) ions are parityforbidden, the absorption coefficient is very low, and the intensity of luminescence is weak.…”

Section: Introductionmentioning

confidence: 99%

Syntheses, Crystal Structures, and Photophysical Properties of Heteronuclear Zinc(II)/Cadmium(II)‐Lanthanide(III) Coordination Complexes based on Benzoic Acid

Chi

Liu

et al. 2015

Zeitschrift anorg allge chemie

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The heteronuclear d-f coordination complexes [Er 2 Zn 2 (C 6 H 5 COO) 10 (phen) 2 ] (1), [Ho 2 Zn 2 (C 6 H 5 COO) 10 (phen) 2 ] (2), [Pr 3 Zn 6 (C 6 H 5 COO) 21 (phen) 3 ] (3), [ErCd(C 6 H 5 COO) 5 (phen)·H 2 O] (4), [Ho 2 Cd 3 (C 6 H 5 COO) 12 (phen) 2 ] (5), [EuCd 2 (C 6 H 5 COO) 7 (phen) 2 ] (6) (C 6 H 5 COOH = benzoic acid;phen = 1,10-phenanthroline) were synthesized by hydrothermal methods, and their structures were studied by single-crystal X-ray diffraction. Complexes 1, 2, 4, and 5 crystallize in the triclinic space group P1 and complexes 3 and 6 in the monoclinic space group C2/c. The room temperature IR, UV/Vis/NIR ab-73 sorption, and emission spectra of the six complexes were determined and assigned. In the visible and NIR regions, the emission spectra of complexes show characteristic bands of corresponding Ln III ions, which are attributed to the sensitization from the d block (Zn/Cd-ligand section) and ligands. In comparison with isolated Ln III ions, the NIR emission bands of complexes 1-5 exhibit shifting, broadening and splitting, which are also present in their UV/Vis/NIR absorption spectra. Thus, the two spectra of complexes can evidence each other. sensitize luminescence of Ln III ions. In recent decade, transition metal ions are introduced into Ln III complexes, such as Cr III , Ag I , Cu I , Os II , Cd II and so forth. [30][31][32][33] There are mainly two functions for the luminescence of Ln III ions. One is, the d block constructed by the transition metal ions and organic ligands can absorb longer wavelength light in comparison with organic ligands, so the energy gap between the sensitizer and the emission state will narrow and reduce the energy loss. The other is, the d-orbital of transition metal ion and f-orbital of Ln III ion may interact due to the small separation of two metal ions, which may probably cause intra-levels of the system to adjust. So f-f emission bands of Ln III ions will present shift, broad and split, and special luminescent materials can be obtained.In order to study the sensitization from the d-block and ligands to Ln III ions, and the influence of different transition metal ions on characteristic emission bands of Ln III ions in df complexes, six Zn/Cd-Ln coordination complexes were synthesized and characterized by single-crystal X-ray diffraction, X-ray powder diffraction (XRD), thermogravimetric (TG) analyses, IR UV/Vis/NIR, and fluorescent spectroscopy. Moreover, the NIR luminescent properties of complexes 1-5 were studied and analyzed.

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“…22 Benzimidazoles have good biological applications, such as anti-inflammatory, 23 antiviral, 24 DNA binding, 25 etc. They also make considerable contribution towards the development of OLEDs, 26 photoluminescent materials, 27 and DSSCs. 28 And also benzimidazole based gelators were reported to serve as gas and dye adsorption materials, 29 phase transfer catalysts, 30 organic nanomaterials, 31 and chemosensors.…”

Section: Introductionmentioning

confidence: 99%

Self-assembly of novel benzimidazole N-glycosylamines into nanofibers and nanospheres

2014

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Hetero-binuclear near-infrared (NIR) luminescent Zn–Nd complexes self-assembled from the benzimidazole-based ligands

Cited by 13 publications

References 31 publications

Carbonato-bridged heteronuclear NiII2LnIII2 (Ln=Tb, Dy, Ho, Er, Tm, Yb, Lu) complexes synthesized by fixation of atmospheric CO2 – Structural and magnetic studies

Carbonato-bridged heteronuclear NiII2LnIII2 (Ln=Tb, Dy, Ho, Er, Tm, Yb, Lu) complexes synthesized by fixation of atmospheric CO2 – Structural and magnetic studies

Syntheses, Crystal Structures, and Photophysical Properties of Heteronuclear Zinc(II)/Cadmium(II)‐Lanthanide(III) Coordination Complexes based on Benzoic Acid

Self-assembly of novel benzimidazole N-glycosylamines into nanofibers and nanospheres

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